Arc-lamp.



C. A.v B. HALVUHSUN, JR.

ARC LAMP.

APPLICATION FILED SEPT. 16. 1914.

1,1 90,159. i Patented July 4, 1916.

Witnesses: Inventor:

Cbromwel I aqHalvorsonJl;

IUruTEiiJ STATES PATENT OFFICE.

CBOEWELL A. B. HALVOBSON, JB., F LYNN, MASSACHUSETTS, ASSIGNOR '.l'OGENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ARC-LAMP.

. To all fuiho'm, 'it may concern Be it known that I, CROMWELL A. B.HAL- vonsoN, Jr., a citizen of the United States, residing at Lynn,county of Essex, State of Massachusetts, 'have invented certain new anduseful Improvements in Arc-Lamps, of which the following is aspecification.

My invention has reference to arc lamps mounted on posts or othersupports, and is particularly applicable'to'inclosed flame arc amps'although not limited to arc lamps of this character.

Inclosed ame are lamps have hitherto been vbuilt comprising v asubstantially air tight arc inclosure formed of an inclosing globe openat the top and seated against and communicating with a superimposeddepositing chamber within which the gases-evolved from the are circulateand where the solidi- 'able products of combustion are deposited.v

. Lamps of this character' are usually provided with an outer globe tokeep the inner globe hot and to improve the distribution of light.

Fig. 4 is When such lamps are suspended in the usual way, it is onlynecessary to either lower or globes in order to trim the lamp and 'cleanthe globe. When, however, the lamp is mounted upon a post or otherlsupport, special provision must be made for obtaining access to theinner globe for the purposeof cleaning the same and of trimming thelamp, and the provision of means for this purpose is one oflthe objectsof my invention.

A further object of my invention is the provision of a novel form ofouter globe and support therefor.

Other objects'of my invention will be apparent from the description andwill be particularly ointed out in the claims.

For a uller understanding of myinvention reference maybe had to theaccompanying drawin in which- Figure 1 1s aV sideview of al lampembodying my invention with certain portionsin section and with someportions broken away; Fig. 2 is a sectional plan view partially brokenaway, showing the doorv formed in the outer globe in open position; Fig.3 is a sectional elevation of a .part of the lamp; a fragmentary planview showing a portion yof Athe upper ring of the globe cut away to forma seat for the door in which is mounted a anel ofthe outer globe; andFig. 5 is a etail sectional view on the line 5-5 Fig. 1, showing-alockingl device for Specification of Letters Patent.

Patented July 4, 1916.

Application led September 16, 1914. Serial No. 861,961.

the door in the outer globe at the bottom thereof.

Referring now to the drawings in which likereference characters indicatethe -same parts in the different views, 10 is a ost or other support uon which is mounte a supporting frame or the outer globe and for thelamp itself. This frame comprises'a lower annular ring 11 mounted uponthe support 10 and air upper ring 12 which is jolned with the ring 11 bysuitably formed ribs 13, 14,y 15 and 16, each lin a vertleal plane withthe axis ofthe rings 11. and 12. The ribs '13 and 16 are longitudinallydivided intosectons 13 and 13b, and 16 and 16" respectively. 13b and 16a are fixed members of the globe frame while the rib sections 13a and16h form with the ring sections 11a and 12 a door frame 17 which ishinged at 18`to section -16a of the rib 16. The bottom ring 11 isprovided with a slot 20 (see Fi 5) beneath the door 17` for thereception oa lug or pin 21 carried by the ring section 11a for thepurpose of locking the door in its closed position. yThe section 11el isprovided with an outstanding lug 22 in which is secured a ring 23 bywhich the door may be ,lifted and opened.

The outer globe A is com osed of a number of panels 24,25, 26 and 2?,three of which, 24, 25 and 26, are seated against the anges l 28 formedat the inner edges of the ribs 13,

14, 15 and 16, as shown in Fig. 2, and against ledges 29 formed ,on theupper ring 12, as shown in Fig. 3and on the lower ring, as shown inFigs. 1 and 5, the panel 27 being mounted in the door frame 17. Thevarious panels are preferably vheldin position by flexible means which Ihave here shown as (See Fig. 2.) The rib sections coil springs 30 whichare secured at their ends to adjacent ribs, the ends of the springswhich hold the vlpanel of the door in position being secured to the' ribsections of the door frame. The springs engage the panels at the top andbottom respectively, the top and ioo l which solidifiable products ofcombustion are deposited. This depositing chamber', which forconvenience l have referred to as a part of the arc lamp frame isrepresented by the numeral 31. rlhis depositing chamber is of a diameterrather large in proportion to its height and is preferably formed toextend laterally well' beyond the top of the supporting frame. The underside of the depositing vchamber is preferably provided with a downwardlyextending fiange 31`a against which is seated, substantially air tight,the inner globe 32. The inner globe and depositing chamber thus form asub-I stantially air tight inclosure. rllhe bottom plate 33 of the lampframe, which "l have here shown. in the form of a frustum of a cone, isreceived in an opening 34 in the top wall of the depositing chamber.rl`he upper electrode 35 passesfthrough the bottom plate 33. in theusuall way; while the lower electrode 36 is carried by a rod 37. A tube40 for the accommodation of the 'conductors leading from the support 10to the arc lamp mechanism passes through the upper and lower walls ofthe Ydepositing chamber.

llt will be understood, of course, that any desired feeding mechanismmay be used for the lamp, although with a structure such as l have hereshown, it will usually be. preferable to employ a focusing mechanism,the mechanism for the lamp being carried by` the arc lamp frame abovethe depositing chamber and inclosed within a casing which willpreferably be formed to harmonize with the appearance of the outerglobe.

In order vto readily bring the inner vglobe into the opening formed bythe door in the outer globe when the door is open, the depositingchamber is hinged to the upper ring' 12 at 38 at a point opposite thedoor in the globe. The lower side of the depositing chamber isprovidedwith a flange 39 which engages, on its inner face, the upperring 12 so that when the depositing chamber is in position it willlockfthe ring section 12, including the section 12 and thereby the doorin position. y

The inner globe and the door in the outer globe are of such relativesizes that the inner globe may readily be removed through the openingformed by the door when the saine is open. Now, in order to trim thelamp it is only necessary to irst slightly tilt the lamp about the hinge38, which unlocks the door, then open the door and then further tilt thearc lamp frame about the hinge 38 which brings the inner globe into theopening in the outer globe. rl`he inner globe then may readily beremoved.

In accordance with the provisions of the patent statutes, l havedescribed the principle of operation of my invention, together with aremovable panel, .an arc lamp frame mounted upon said supporting frame,an inner globe secured to said frame and depending within the outerglobe, the arc lamp frame being tiltably mounted on the supporting frameso as to bring the inner globe opposite the removable panel when the arclamp frame is tilted.

2. In an arc lamp, asupporting frame comprising a number ofsubstantially vertical ribs, an outer globe divided into a num` ber ofpanels secured .between said ribs,

one-of the panels being pivotally mounted whereby the saine may beopened, an arc lamp frame mounted upon said supporting frame, and aninner globe secured to said arc lamp frame and depending within theouter globe, the arc lamp frame being pivoted opposite the pivoted panelwhereby the inner globe is brought into the opening formed by said panelwhen the arc lamp is tilted.

3. In an arc lampa supporting frame, an outer globe secured to saidframe and provided with a removable panel, an are lamp frame providedwith a depositing chamber for fumes evolved from the .arc mounted uponsaid supporting frame, an inner globe open at the top secured beneaththe depositing chamber and communicating therewith, said depositing'vchamber being pivoted to said supporting frame opposite the removableApanel, whereby the inner globe is brought into the opening formed by theremovable panel when the arc lamp frame is tilted.

4. In an arc lamp, a supporting frame comprising upper and lower ringsjoined by a number of ribs, an outer globe divided into a number ofpanels mounted between said ribs, one of the panels being mounted on ahinged frame, an arc lamp frame mounted upon the vtop ring oit saidframe and hinged thereto opposite the removable panel, an inner globesecured to the arc lamp frame and depending within the outer globe,whereby when the arclamp is tilted the inner globe is brought into theopening formed by the removable panel.

.5. In an arc lamp, a base, a supporting frame mounted thereon, an outerglobe secured thereto, an arc lamp frame comprising a flat depositingchamber seated upon said supporting frame, an inner globe securedagainst said depositing chamber, and

f a tube extending through the upper and my hand this 'eleventh dey ofSeptember lower Walls of the depositing chamber and 1914.

communicating with the space between the inner and outer globes foraccommodating CROMWELL A' B' HIYORSON JR'.

the conductors extending from the base to Witnesses:

the arc lamp. JOHN A.. MOMANUS, J r.,

In Witness whereof, I have hereunto set EMILE J. GUAY.

